similar to: Error in nls Error in if(any(start < low || start > upp)) {: missing value when TRUE/FALSE needed

Full_Name: Manuel A. Morales Version: 2.8.1 OS: Linux Submission from: (NULL) (137.165.199.246) When fitting a model in nls using the algorithm port with constraints and the shorthand parameter[factor] in the model, I get the following error message: "Error in nls_port_fit(m, start, lower, upper, control, trace) : (list) object cannot be coerced to type 'double' In addition:

The documentation for nls says the following about the starting values: start: a named list or named numeric vector of starting estimates. Since R 2.4.0, when 'start' is missing, a very cheap guess for 'start' is tried (if 'algorithm != "plinear"'). It may be a good idea to document that when algorithm = "port", if start is a named

Hi, I'm using optim with box constraints to MLE on about 100 data points. It goes quite slow even on 4GB machine. I'm wondering if R has any faster implementation? Also, if I'd like to impose equality/nonequality constraints on parameters, which package I should use? Any help would be appreciated. Thank you. rc

Dear R-helpers, does anyone know of some package/function that can build a network from the functions that are implemented in a package, i.e. visualize the cross-references from one function to another in the same or some dependent package? An example would be a function like 'nls' on top of the hierarchy and then a network of nodes from the functions that are called within 'nls'

Hi, I have a couple of aggregation operations that I don't know how to accomplish. Let me give an example. I have the following irregular time series time x 10:00:00.021 20 10:00:00.224 20 10:00:01.002 19 10:00:02:948 20 1) For each entry time, I'd like to get sum of x for the next 2 seconds

Hi, To set a simple an clear picture of what I'd like to do, here is an example. I would like to calculate mean of column A and B bucketed by factor in column X in a data.frame. lapply or aggregate operates on a single column. I found dapply function in some package which doesn't seem to exist any more. Is there anyway that I can accomplish something like this? Thank you so much in

Hi, I have the following string that I converted to a POSIXct: > a <- "2009-08-24 10:00:00.213" > a.p <- strptime(a,"%Y-%m-%d %H:%M:%OS") > as.double(as.POSIXct(a.p)) [1] 1251122400 I can't seem to get the decimal fraction of .213 out by casting to double or numeric. Is there anyway to make sure that POSIXct spits that out? Thank you. adschai

Hi - I read through dse package manual a bit. I'm not quite certain how I can use it to estimate a time varying coefficient regression model? I might pick up an inappropriate package. Any suggestion would be greatly appreciated. Thank you. rh

Hello everybody, so, here's the summary of my progress (note that it also includes a few items to discuss, so I'm cc-ing this to nut-upsdev as well). I. The planning: 1/ libnutconf: The core (i.e. config. classes and their (de)serialisers) is coded, UT in progress. Signalisation shall follow; I have a couple of practical thoughts & comments to this, see below. In general, I'd

Thanks, Luke, for having a look to it. Sure, I can give you some reproducible example -- even in two degrees of completeness ;-): see below. Thanks again, Peter %----------------------------------- (I) first example %----------------------------------- Just to reproduce the error, on r-devel, try: install.packages("RobAStRDA") require(RobAStRDA) getFromNamespace(".RMXE", ns

Hi r-devels, we are seeing a new problem with our packages RobAStRDA (just new on CRAN, thanks to Uwe and Kurt!) and RobExtremes (to be submitted). It must be something recent with the way you internally treat/store byte-code compiled functions, as we have no problems with R-3.1.3, but do see an "Error in fct(x) : byte code version mismatch" with R-devel SVNrev r70532. Background:

Hi, When I define a new class (through setClass), members defined in representation argument doesn't seem to like a class. For example, if I do the following: setClass("NotWork",representation=(x="zoo")) It seems to me that representation members will take in only primitive type to R. Is there any way to stuff a class as a member in another class? Thank you. - adschai

Hi, I am trying to install package xts. I am using OPENSUSE 11 64 bit. When I invoke: install.pacakges("xts",dependencies=T) I received a lot of "ERROR: compilation failed for package" errors when R tries to install xts dependencies. I do not understand this behavior. I notice one thing. It complains. ERROR: compilation failed for package 'Hmisc' ** Removing

Hi, I have a matrix or data.frame (df). When I would like to check if a column named "x" exists, it becomes my habit to do the following: if (length(which(colnames(df)=="x"))>0) Is there any smarter way to do this? Thank you. adschai [[alternative HTML version deleted]]

Hi, I have a list that contains about 100 elements. Each element contains the following matrix structure a b 1 1 4 2 2 5 3 3 6 I'd like to sum column b across all elements. I'm thinking of using lapply or sapply but cannot get it to work. Any help would be really appreciated. Thank you. adschai

Dear R users, I am a new R user and something stops me when I try to write a academic article. I want to make a nomogram to predict the risk of prostate cancer (PCa) using several factors which have been selected from the Logistic regression run under the SPSS. Always, a calibration plot is needed to validate the prediction accuracy of the nomogram. However, I tried many times and read a lot of

Hi, I'm running into a wall when trying to use the integrate function. I have the following setting: powerLaw2 <- function(x,l1,l2,c0,t0) { idx <- which(x <= 0); if (length(idx) > 0) { x[idx] <- 0; } xl <- (-l1+l2)*log(x/t0); L <- log(c0)-l1*log(x)-log(1+exp(xl)); L <- exp(L); return(L); } plCDF2 <- function(x,l1,l2,c0,t0) {

Hi, I'm a bit puzzled. I uses exactly the same code in RcppExamples package to try adding RcppFrame object to RcppResultSet. When running it gives me segmentation fault problem. I'm using gcc 4.1.2 on redhat 64bit. I'm not sure if this is the cause of the problem. Any advice would be greatly appreciated. Thank you. Rob. int numCol=4; std::vector<std::string>

*I've been trying for several weeks to install R-2.2.1 on a PC with an AMD Athlon 64 2800*+* processor running Mandriva 2006_64. After unpacking R-2.2.1.tar.gz I ran ./configure. However, configure stopped prematurely with the message *"configure:27295: WARNING: gfortran and gcc disagree on int and double configure:27297: error: Maybe change CFLAGS or FFLAGS?"* Altough

Dear R_Help: The following gives me a matrix with integer values. z= matrix(rep(10:1, each= 10), ncol= 10, byrow=TRUE)> str(z)?int [1:10, 1:10] 10 9 8 7 6 5 4 3 2 1 ... How do I specify that I want Float32 values instead. Thanks,Chris